#define I2C_SLAVE 0x48
#define _WRITE_LOG 0x00
#define _OPEN 0x02
#define _CLOSE 0x04
#define _FNAME 0x08
#define _RESET 0x0A
#define _MINLOG 0x0C
#define _LOG 0x0E
#define _PLAT 0x0F
#define _POS 0x80
#define _VEL 0x8C
#define _AGE 0x98
#define _STATUS 0x9C
#define _LOGSTAT 0x9D

